import java.util.*;

public class CountOccurrenceOfWords {
  public static void main(String[] args) {
    // Set text in a string
    String text = "Good morning. Have a good class. Afternoon. Have a good time. " +
      "Have a good visit. Have fun!";

    // Create a TreeMap to hold words as key and count as value
    Map<String, Integer> map = new TreeMap<String, Integer>();

    String[] words = text.split("[ \n\t\r.,;:!?(){}]");
    for (int i = 0; i < words.length; i++) {
      String key = words[i].toLowerCase();
      
      if (key.length() > 0) {
        if (!map.containsKey(key)) {
          map.put(key, 1);
        }
        else {
          int value = map.get(key);
          value++;
          map.put(key, value);
        }
      }
    }

    // Get all entries into a set
    Set<Map.Entry<String, Integer>> entrySet = map.entrySet();

    // Get key and value from each entry
    for (Map.Entry<String, Integer> entry: entrySet)
      System.out.println(entry.getKey() + "\t" + entry.getValue());
  }
}
